6_Production_BI370

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11 Terms

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Primary productivity

Biomass generated from photosynthesis and chemosynthesis.

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Net primary productivity (NPP)

NPP = GPP - respiration.

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Consumption efficiency

Proportion of biomass that is ingested and not wasted.

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Secondary productivity

The biomass produced by consumers, derived from consuming primary producers.

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Mesopredators

Mid-ranking predators in a food web that can be preyed upon by higher-level predators.

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Trophic efficiency

The efficiency at which energy is transferred from one trophic level to the next.

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Freshwater productivity

Influenced by phosphorus.

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Marine productivity

Limited by iron, then nitrogen, then phosphorus. Highest at continental shelves and middle latitudes.

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Terrestrial productivity

Limited by temperature and precipitation. Highest at trophics.

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Assimilation efficiency

Proportion of ingested food that is assimilated, and not lost as waste.

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Production efficiency

Proportion of assimilated food that is not lost to respiration, and is used for growth and reproduction.